В треугольнике ABC,DE- средняя линия.Площадь треугольника CDE равна 78. Найдите площадь треугольника ABC.

ПОМОГИТЕ!!!!ПОМОГИТЕ!!!ПОМОГИТЕ!!!СРОЧНО НАДО!!Say:If you have ever been to a fair, when it was and what impression it made on you.Who mends and repairs things in your family.If you have ever had a bargain buying something and how it happened.What in your opinion fortune-tellers do.When people may have sour faces or sour smiles.When and how often you use thread and needles.What your mother usually says when you drop a glass or a cup and break them.What you can spread bread with.

а)   Решите уравнение : (3,44:(0,711-0,311)+2)x=190,8

б)   Округлите дроби до десятых : 2,465  ;3,11  ;4,15  ;8,155

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